QDM - So you did.
How often do you fly?
If you got in with someone else, and they didn't use a checklist for the internals, would any scenario bother you? If they flew every day, I assume not, how about a weekly flyer, a monthly flyer?
How about someone like me who (until I did a dual refresher on Saturday) had gone 3 months with neither time on type or any P1 at all.
Just trying to prod your limits - cos' I don't believe you really mean no-one needs checklists.